I do have an older style adapter in mine. There is two seal in it that seal the coupler then the shafts have o ring on them. The problem seem to be that the o rings don't seem to seal inside the coupler completely, so this is whereat seem the that the guild leaks thru. I put some rtv silicone on mine, maybe not enough, but it still leaks. I did talk advance adapters and I may just put a new coupler in it also when I pull the transfer case out to try and fix the issue.
